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Endocrine Glands and Hormones
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Glucagon




Raises blood glucose levels; regulated by glucose levels in the bloodstream




Endorphins




Reduce pain and induce feelings of pleasure or euphoria; regulated by stress and exercise




Adrenal glands




Produce hormones like cortisol and adrenaline; help the body control blood sugar, burn protein and fat, react to stressors like a major illness or injury, and regulate blood pressure




Vitamin D (Calcitriol)




Regulates calcium and phosphorus levels for healthy bones; regulated by PTH, calcium, and phosphate levels




Atrial Natriuretic Peptide (ANP)




Lowers blood volume and pressure by causing blood vessels to expand and the kidney to excrete sodium; regulated by atrial distention and increased sodium levels




Testosterone




Promotes the development of male secondary sexual characteristics; regulated by LH and FSH from the pituitary




Adrenaline (Epinephrine)




Increases heart rate, muscle strength, blood pressure, and sugar metabolism; regulated by the sympathetic nervous system




Follicle-Stimulating Hormone (FSH)




Stimulates follicle growth in ovaries and spermatogenesis in testes; regulated by GnRH from the hypothalamus




Corticotropin-Releasing Hormone (CRH)




Stimulates the secretion of ACTH from the anterior pituitary; regulated by stress and diurnal rhythms




Mineralocorticoids




A group of hormones including aldosterone that maintain salt and water balance; regulated by RAAS and blood potassium levels




Noradrenaline (Norepinephrine)




Works with adrenaline in response to stress; increases alertness and arousal, and can also elevate mood; regulated by the sympathetic nervous system




Ghrelin




Stimulates appetite and increases food intake; regulated by the stomach and nutrient intake




Somatostatin




Inhibits growth hormone and thyroid-stimulating hormone release; regulated by growth hormone feedback




Insulin




Lowers blood glucose levels; regulated by glucose levels in the bloodstream




Antidiuretic Hormone (ADH, Vasopressin)




Promotes water retention by the kidneys and increases blood pressure; regulated by blood osmolarity and blood volume




Melatonin




Regulates sleep-wake cycles; regulated by light exposure to the retina




Oxytocin




Stimulates uterine contractions during childbirth and milk ejection during breastfeeding; regulated by childbirth and infant suckling




Glucocorticoids




A group of hormones including cortisol that are involved in the regulation of metabolism and immune response; regulated by stress and ACTH




Erythropoietin (EPO)




Stimulates red blood cell production; regulated by oxygen levels in the blood




Thyroid gland




Produces hormones that regulate metabolism, body heat, and bone growth




Leptin




Suppresses appetite; regulated by fat tissue




Pituitary gland




Controls various hormones of the body; master regulator with both anterior and posterior lobes




Thyroxine (T4)




Regulates metabolism; regulated by TSH from the pituitary




Cortisol




Regulates metabolism, reduces inflammation, and assists with memory formulation; regulated by ACTH from the pituitary




Parathyroid glands




Regulate calcium levels within the blood through the secretion of parathyroid hormone




Thyroid-Stimulating Hormone (TSH)




Stimulates the thyroid gland to produce T3 and T4; regulated by TRH from the hypothalamus and feedback from thyroid hormones




Triiodothyronine (T3)




Regulates metabolism; regulated by TSH from the pituitary




Parathyroid hormone (PTH)




Increases blood calcium levels by stimulating osteoclasts, increasing intestinal calcium absorption, and increasing kidney calcium retention; regulated by blood calcium levels




Estrogen




Promotes the development of female secondary sexual characteristics; regulated by FSH and LH from the pituitary




Luteinizing Hormone (LH)




Triggers ovulation and the development of the corpus luteum in females; regulates testosterone synthesis in males; regulated by GnRH from the hypothalamus




Gonadotropin-Releasing Hormone (GnRH)




Stimulates the release of FSH and LH from the anterior pituitary; secretion is pulsatile




Human Chorionic Gonadotropin (hCG)




Maintains the corpus luteum during the beginning of pregnancy; detected in pregnancy tests




Growth Hormone (GH)




Stimulates growth, cell reproduction, and cell regeneration; regulated by GHRH and somatostatin from hypothalamus




Calcitonin




Lowers blood calcium levels by inhibiting osteoclasts and stimulating calcium excretion by the kidneys; regulated by blood calcium levels




Aldosterone




Regulates blood pressure by increasing sodium retention and potassium excretion; regulated by the renin-angiotensin-aldosterone system (RAAS) and blood potassium levels




Progesterone




Supports pregnancy and embryogenesis; regulated by LH from the pituitary




Prolactin




Induces milk production; regulated by PIH (Dopamine) from the hypothalamus




Adrenocorticotropic Hormone (ACTH)




Stimulates the production and release of cortisol from the adrenal cortex; regulated by CRH from the hypothalamus




Thyrotropin-Releasing Hormone (TRH)




Stimulates release of TSH and prolactin from the anterior pituitary; regulated by the negative feedback of thyroid hormones
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